Baffle for boilers.



J. T. FENNELL. I

BAFFLE FOR BOILERS.

APPLICATION FILED MAR.23,1914.

1 $24,405, Patented Jan. 12, 1915.

3 SHEETS-SHEET 1.

b. awnwwhom dmea Z'FzzzzeZZ.

wi bneooao Ill NORRIS I 1 11- H5 (.n, mum: I Irno. \VAbH/Nh/UN. n I;

J. T. FENNELL.

BAPPLE FOR BOILERS,

APPLICATION FILED MAE.23,1914.

1,124,405. Patented Jan, 12, 1915.

3SHEETSSHEET 2.

eidmes ZFzmeZZ THE NORRIS PETERS CO. PHDTG-LITHOY. WASHINGTON, DV 6.

J. T. FENNELL.

BAFFLE FOR BOILERS.

APPLICATION FILED MAR. 23. 1914.

1,124,405, Patented Jan. 12, 1915.

3 SHEETS-SHEET 3.

wi/buoow THE NORRIS PETERS 60., PHOTO-LITHCL. WASHINGTON. D. c.

STATS ATEN FFIG.

BAFFLE non BOILERS.

Specification of Letters Patent.

Patented Jan. 12, 1915.

Application filed March 23, 1914. Serial No. 826,601.

To all whom it may concern:

Be it known that I, JAMES T. FENNELL, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Baflles for Boilers, of which the following is a specification.

My invention relates to improvements in baflles for boilers, the object of the invention being to provide an improved construc tion of ballle consisting of a series of metal plates supportedupon the boiler tubes and interlocking at their meeting edges so as to compel the smoke and gases to pass around the bailie without any leakage through the same.

A. further object is to provide in a steam boiler an improved construction of battle or baffles which are supported upon the up per surface of the water tubes, and which are securely held against movement relative to each other, and have interlocking joints which are so disposed relative to the direction of flow of the smoke and gases that possibility of leakage is reduced to a minimum.

A further object is to provide an improved baflle of this character in which any of the plates or sections can be readily replaced when desired, and which dispenses with the necessity of employing the ordinary fire brick such as in common use, and which result in an endless amount of trouble and worry because of leakage between the bricks and because of the fact that the bricks become injured and the job of replacing the same is an extremely troublesome one.

With these and other objects in view, the invention consists in certain novel features of construction and combinations and arrangements of parts as will be more fully hereinafter described and pointed out in the claims.

In the accompanying drawings: Figure 1 is a view in longitudinal section through a water tube boiler of a well known type illustrating my improvements in connection therewith. Fig. 2 is a fragmentary view in horizontal section on the line 2-2 of Fig. 1. Fig. 3 is a perspective view of one of the bafiie plates. F ig. 4 is a view in section on an enlarged scale illustrating the joint of two of the battle plates. Fig. 5 is a plan view illustrating a modified form of baffle. Fig. 6 is a perspective view of one of the baffle plates shown in Fig. 5, and Fig. 7 is a perspective view showing one of the baflie holding bars.

In Figs. 1 and 2, I illustrate a stationary water tube boiler of a well known type in which. 1 represents the water tubes which are located in a general horizontal position, although some of the tubes are at a considerable incline and around these tubes the smoke and gases from the fire box 2 is directed after passing over the ordinary bridge wall 3. The direction of flow of the smoke and gases is controlled by my improved baflies 4:, and I would have it understood that while Ihave illustrated three of these baflies, so that the passage of smoke and gases will take the general course indicated by the arrows, that I do not limit myself to any particular number of battles as I may employ any number in accordance with the desire of the trade. Each battle consists of a longitudinal series of baflie plates 5 which are preferably of cast metal and extend throughout the entire width of the boiler where such boiler is of an average width. There the boiler is unusually wide, I may employ two or more of these plates as shown clearly in Fig. 5, which will be hereinafter described. The longitudinal dimension of the plate 5 is positioned transversely of the boiler, and at its ends snugly fits against the sides of the boiler, although suliicient space may be provided to allow for expansion and contraction as may be desired. The edges of the plates 5 are reversely recessed so that while a forwardly projecting tongue 6 is provided at the lower face of the plate at one edge, a similar tongue 7 is provided at the upperface of the plate at its other edge. It will be noted that these recesses give to the tongues a general compound curvature, so that the joint or overlapping portion of the plates have an ogee configuration. The invention is, of course, not limited to this particular shape of overlap'as it may be made in other ways, but has been found to be an advantageous one because of the extended 'contacting surface to prevent leakage. On the upper face of each plate 5, a plurality of integral beveled lugs 8 are provided which are located at the extreme edge of the plate and serve to guide the plates together and hold them in their interlocked overlapping juncture. The battle is held against move ment and the plates held against separation by means of locking bars 9 which are located between the end plates and some fixed part or wall of the boiler. These bars 9 extend under the lugs 8, and they are cut off in lengths to suit the open space between the bailie and the end of the boiler, any suitable abutment being provided for the ends of the bars to suit the particular type of boiler. As shown clearly in Fig. 1, the baflie plates are so arranged that their overlapping portions afford the least possible liability for leakage. In other words, the lowermost baffle has its plate so arranged that the under-lying tongues extend in the same direction as the flow of the smoke and gases. The next highest battle has its plates reversed so that its lowermost tongues extend in the direction of the flow of the smoke and gases because of the fact that the smoke and gases take a forward movement after passing around the end of the lowermost baflie. The uppermost bai'lle has its plates arranged like the lowermost, and in all such arrangements it is to be understood that the under-lying tongues will project in the direction of the flow of the smoke and gases.

In the modification illustrated in Figs. 5 and 6, the baffle is formed of two longitudinal series of plates 10 which are precisely like the plates 5 except that the plates have overlapping tongues 11 at one end as well as at their edges, and at one end of one plate lugs 12, corresponding to lugs 8 are provided to insure a tight uncture. It will therefore be noted that I do not confine myself to a single series of plates, but in most cases a single series is all that is necessary.

In extremely wide boilers, I may provide a plurality of series, and in all events will interlock the plates in the maner stated so as to reduce leakage to a minimum. Furthermore, it will be noted that the plates are supported on the upper surface only of the boiler tubes, so that the maximum radiating surface of the tubes are exposed.

Various slight changes might be made in the general form and arrangement of parts described without departing from my invention, and hence I do not limit myself to th precise details set forth, but consider myself at liberty to make such changes and alterations as fairly fall within the spirit and scope of the appendedclaims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A baffle comprising a longitudinal series of plates, said plates having overlapping tongues at their adjacent ends, and beveled lugs on the plates holding the overlapping tongues together, substantially as described.

2. A bafiie comprising a series of plates adapted to be supported on the tubes of the boilers, said plates having overlapping juncture of general ogee form, and integral inclined lugs on the plates projecting over the overlapping portions of adjacent plates, substantially as described.

3. In combination with a steam boiler furnace, a plurality of bafiles supported on the tubes of the furnace, each bafiie consisting of a longitudinal series of plates having overlapping portions at their edges, all of said plates positioned with the underlying portion of each joint projecting in the direction of the passage of the smoke and gases, beveled integral lugs on each plate projecting over the overlapping portion of the adjacent plate, substantially as described.

at. In combination with a steam boiler furnace, a plurality of baflles supported on the tubes of the furnace, each baffle consisting of a longitudinal series of plates having overlapping portions at their edges, all of said plates positioned with the underlying portion of each oint projecting in the direction of the passage of the smoke and gases, beveled integral lugs on each plate projecting over the overlapping portion of the adjacent plate, and spacing bars located at one end under certain of said lugs and at their other ends against a fixed part of the boiler, whereby the plates are locked against movement, substantially as described.

5. A bafile plate comprising a single casting having a tongue projecting from its lower face at one longitudinal edge, and having a second tongue projecting from the upper face of its other longitudinal edge, said plate having on its upper face a series of beveled lugs projecting over the firstmentioned tongue, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

JAMES T. FENNELL.

Witnesses CHAS. E. Po'rTs, M. E. DIITUS.

Copies of this patent may be obtained for five cents each, by addressing the Comminioner of Patents, Washington, I). C. 

